Route profile
IAD→RSW
Flight reliability, delays and best times to fly from Washington to Fort Myers, 891 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 81% of comparable major US routes (4,598 compared)
Calculated from 1,512 flights. How this is calculated
IAD → RSW arrives on time 85.9% of the time; the return trip, RSW → IAD, arrives on time 88.6% of the time, a 2.7-point gap between the two directions of the same city pair.
IAD → RSW spends 26.2 minutes on the ground on an 891-mile trip: 20.9 minutes from pushback to wheels-up at IAD and 5.4 minutes from touchdown to gate at RSW.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
This route has stayed remarkably steady year over year, a smaller swing than 92% of 5,368 comparable routes.
87.2% on time over the most recent 12 months (2025-08 to 2026-07), against 86.7% in the 12 months before (2024-08 to 2025-07), virtually unchanged.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 5,368 in the comparison.
What sets this route apart
Where IAD to RSW differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
IAD to RSW is at its best against routes of similar length for flights scheduled at 5 PM: 80.6% arrive on time, 12.9 points ahead of the 67.7% those routes manage at that hour. Against all other routes the gap is 10.8 points.
IAD to RSW holds up on Thursdays better than routes of similar length do: 88.4% on time to their 76.5%, a 11.9 points lead. Against all other routes the gap is 11.6 points.
July is kinder to IAD to RSW than to routes of similar length: 86.3% on time against 68.4%, 17.9 points better. Against all other routes the gap is 16.6 points.
United Airlines does better on IAD to RSW than on its routes of similar length: 85.9% on time here, 80.6% there, 5.3 points apart. Against all other routes the gap is 6 points.
IAD to RSW against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 5 PM departures | 80.6% | routes of similar length | 67.7% | +12.9 pts | 247 here, 173,083 there |
| Weekday: Thursday | 88.4% | routes of similar length | 76.5% | +11.9 pts | 215 here, 425,839 there |
| Month: July | 86.3% | routes of similar length | 68.4% | +17.9 pts | 124 here, 318,073 there |
| Airline: United Airlines | 85.9% | routes of similar length | 80.6% | +5.3 pts | 1,492 here, 477,576 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 891 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
When it goes wrong
July 2023 – July 2026
27 min late
against a median of 9 min early
Percentiles over 1,512 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at RSW after arriving from IAD.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 26% | High risk |
| 45 min | 13% | Some risk |
| 60 min | 9.5% | Some risk |
| 90 min | 5.5% | Some risk |
| 120 min | 3.6% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.12% of the time and diverts 0.20% of the time, which a late arrival never shows up in.
Chance of missing is the share of 1,492 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 27 minutes late (90th-percentile gate arrival delay), over 1,512 operations.
Any other layover length: connection checker.
Best time to fly
IAD → RSW flights departing 9 AM–12 PM arrived on time 90.3% of the time, against 80.6% for 3–6 PM departures, a gap of 9.7 percentage points.
By departure window
By departure hour
- 12 AM to 7 AM: too few flights to score
- 8 AM: 86.4% on time from 553 flights
- 9 AM: 90.3% on time from 439 flights
- 10 AM to 12 PM: too few flights to score
- 1 PM: 81.4% on time from 250 flights
- 2 PM to 4 PM: too few flights to score
- 5 PM: 80.6% on time from 251 flights
- 6 PM to 11 PM: too few flights to score
Why IAD → RSW runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for IAD → RSW. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on IAD → RSW, at 34.4%: flights here mostly leave late because the plane came in late, and the day shows it: 9 AM–12 PM departures arrived on time 90.3% of the time and 3–6 PM departures 80.6%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| United Airlines | 1,512 | 85.9% | 1.12% | -9 min | 5.6% |
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| UA1406 United Airlines | 9:00 AM | 991 | 88.1% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 10.8 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 87.2% against 86.7% in the 12 months before — broadly unchanged.
Data and methodology
Calculated by FlyerIntel from 1,512 IAD → RSW flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed